Bantuin dong, no brp aja pakai cara ya. Terimakasih
liliput01
1. diket: r = 15ti + (10t - 7,5t²)j t = 2 s Dit: v....? persamaan kecepatan = turunan pers posisi v = 15ti + (10t - 7,5t²)j dt v = 15i + (10 - 15t)j v saat t = 2s v = 15i + (10 - 15.2)j v = 15i + (10 - 30)j v = 15i -20j besar v v = √15² + (-20)² v = √225 + 400 v =√625 v = 25 m/s---> A , 10. Diket vr = 0,3m/s va = 0,4m/s t = 150s Dit: s.....? v = √vr² + va² v = √0,3² + 0,4² v = √0,09 + 0,16 v = √0,25 v = 0,5 m/s , s = v.t s = 0,5 x 150s s = 75 m ---> B
r = 15ti + (10t - 7,5t²)j
t = 2 s
Dit: v....?
persamaan kecepatan = turunan pers posisi
v = 15ti + (10t - 7,5t²)j dt
v = 15i + (10 - 15t)j
v saat t = 2s
v = 15i + (10 - 15.2)j
v = 15i + (10 - 30)j
v = 15i -20j
besar v
v = √15² + (-20)²
v = √225 + 400
v =√625
v = 25 m/s---> A
,
10.
Diket
vr = 0,3m/s
va = 0,4m/s
t = 150s
Dit: s.....?
v = √vr² + va²
v = √0,3² + 0,4²
v = √0,09 + 0,16
v = √0,25
v = 0,5 m/s
,
s = v.t
s = 0,5 x 150s
s = 75 m ---> B